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1da1

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[[Image:1da1.gif|left|200px]]
 
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==STRUCTURAL CHARACTERISATION OF THE BROMOURACIL-GUANINE BASE PAIR MISMATCH IN A Z-DNA FRAGMENT==
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The line below this paragraph, containing "STRUCTURE_1da1", creates the "Structure Box" on the page.
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<StructureSection load='1da1' size='340' side='right'caption='[[1da1]], [[Resolution|resolution]] 2.25&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1da1]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DA1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DA1 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.25&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BRU:5-BROMO-2-DEOXYURIDINE-5-MONOPHOSPHATE'>BRU</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
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{{STRUCTURE_1da1| PDB=1da1 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1da1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1da1 OCA], [https://pdbe.org/1da1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1da1 RCSB], [https://www.ebi.ac.uk/pdbsum/1da1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1da1 ProSAT]</span></td></tr>
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</table>
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'''STRUCTURAL CHARACTERISATION OF THE BROMOURACIL-GUANINE BASE PAIR MISMATCH IN A Z-DNA FRAGMENT'''
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==See Also==
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*[[Z-DNA|Z-DNA]]
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__TOC__
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==Overview==
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</StructureSection>
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The deoxyoligonucleotide d(BrU-G-C-G-C-G) was crystallised at pH 8.2 and its structure analysed by X-ray diffraction. The unit cell, of dimensions a = 17.94, b = 30.85, c = 49.94A contains four DNA duplexes in space group P2(1)2(1)2(1). The duplexes are in the Z conformation, with four Watson-Crick G.C base pairs and two BrU.G base pairs. The structure was refined to an R factor of 0.16 at a resolution of 2.2A with 64 solvent molecules located. The BrU.G base pair mismatch is of the wobble type, with both bases in the major tautomer form and hydrogen bonds linking 0-2 of BrU with N-1 of G and N3 of BrU with 0-6 of G. There is no indication of the presence of ionised base pairs, in spite of the high pH of crystallisation. The results are discussed in terms of the mutagenic properties of 5- bromouracil.
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[[Category: Large Structures]]
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[[Category: Brown T]]
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==About this Structure==
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[[Category: Hunter WN]]
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DA1 OCA].
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[[Category: Kennard O]]
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[[Category: Kneale G]]
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==Reference==
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Structural characterisation of the bromouracil.guanine base pair mismatch in a Z-DNA fragment., Brown T, Kneale G, Hunter WN, Kennard O, Nucleic Acids Res. 1986 Feb 25;14(4):1801-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/3951996 3951996]
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[[Category: Brown, T.]]
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[[Category: Hunter, W N.]]
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[[Category: Kennard, O.]]
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[[Category: Kneale, G.]]
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[[Category: Double helix]]
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[[Category: Mismatched]]
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[[Category: Modified]]
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[[Category: Z-dna]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:37:04 2008''
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Current revision

STRUCTURAL CHARACTERISATION OF THE BROMOURACIL-GUANINE BASE PAIR MISMATCH IN A Z-DNA FRAGMENT

PDB ID 1da1

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